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Author : Mark G. Hagen
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (343 download)
Download or read book Field Performance of Penetrating Sealers for Concrete Bridge Decks written by Mark G. Hagen and published by . This book was released on 1995 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : José Antonio Pincheira
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (555 download)
Download or read book Development and Layout of a Protocol for the Field Performance of Concrete Deck and Crack Sealants written by José Antonio Pincheira and published by . This book was released on 2009 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this project was to develop and layout a protocol for the long-term monitoring and assessment of the performance of concrete deck and crack sealants in the field. To accomplish this goal, a total of six bridge decks were chosen for study. The decks have ages that vary from 4 to 30 years old, are all in good condition, though some presented a variety of longitudinal, transverse and diagonal cracking. In each deck, test segments were laid out along one lane in four of the six bridges. Drill powder samples were extracted in each segment in order to determine the in-situ, near-surface chloride ion content of the deck. Laboratory analyses of the samples showed that the chloride ion content varied between 3.2 lb/cy for the younger decks (3 years old) and 20.8 lb/cy for the older decks (28 years old). Based on the recommendations of a previous laboratory investigation, a pool of the best performing deck and crack sealants were selected to be applied in the decks. In two bridges, deck segments were sealed with four deck sealants while one segment was left unsealed to be used as a control segment. Additionally, the cracks in each of these segments were sealed with five crack sealants. While two other decks were also scheduled for sealing as part of this phase of the project, they were not done because the required curing time for some of the products was longer than deemed acceptable by DOT crews for these high traffic bridges. It is recommended, however, that every effort be made to have these decks be sealed in the near future. The remaining two bridges had been sealed at the time of construction. While no specific information could be secured about the product used in these decks, the low chloride ion content in these decks suggested that the applied product has helped reduce the ingress of chloride ions. Therefore, it is recommended that these decks continue to be monitored over time. Based on the inspections and the data collected in the field, a protocol and schedule for the continuing monitoring of sealant performance is presented.
Author : T. S. Rutkowski
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (198 download)
Download or read book Evaluation of Penetrating Surface Treatments of Bridge Deck Concretes written by T. S. Rutkowski and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to develop a laboratory procedure that would determine the degree to which a surface treatment (sealer) will protect the substrate of a concrete bridge deck from penetration of moisture in general and chloride ions in particular. The study included absorption tests, resistance to chloride ion penetration tests, vapor permeability tests, a rapid electrical cell test procedure, and an impressed voltage test procedure. The individual test procedures, with the exception of the rapid electrical cell tests, effectively differentiated between the proprietary sealers. However, it was not possible to extrapolate the laboratory test results to years of sealer field performance. None of the applied sealers appeared to be able to completely stop the penetration of moisture or chloride ions into the concrete substrate.
Author : José Antonio Pincheira
Publisher :
ISBN 13 :
Total Pages : 166 pages
Book Rating : 4.:/5 (1 download)
Download or read book Evaluation of Concrete Deck and Crack Sealers written by José Antonio Pincheira and published by . This book was released on 2005 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Melissa A. Dorshorst
Publisher :
ISBN 13 :
Total Pages : 374 pages
Book Rating : 4.:/5 (89 download)
Download or read book Effectiveness and Relative Performance of Concrete Bridge Deck and Crack Sealants written by Melissa A. Dorshorst and published by . This book was released on 2005 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Philip Dale Cady
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.3/5 (555 download)
Download or read book Sealers for Portland Cement Concrete Highway Facilities written by Philip Dale Cady and published by . This book was released on 1994 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis document will be of interest to materials, maintenance, and bridge engineers, and others responsible for protecting and maintaining portland cement concrete (PCC) roadway surfaces. It will be of special interest to materials research and testing officials, as well as to manufacturers who are concerned with developing and evaluating sealers for PCC highway facilities. The information in this Synthesis is limited to surface-applied liquid sealers that are primarily intended to retard the transmission of water and ions below the roadway surface. This report of the Transportation Research Board provides detailed information on generic concrete sealing materials that may be considered a primer on the topic, describing the various classes of sealers, their chemical characteristics, application to specific needs, and practice and performance characteristics. In addition, information is provided on evaluation and testing, application and costs, and the safety and environmental issues of concern with their use. Also included is a glossary of terms, extensive references, and an appendix that includes materials on a procedure for the estimation of service life and a model sealer specification.
Author : John D. Wenzlick
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (429 download)
Download or read book Bridge Deck Concrete Sealers written by John D. Wenzlick and published by . This book was released on 2007 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last several years, MoDOT has experienced problems with excessive amounts of cracking on some new concrete bridge decks. This has led to various concrete sealers being used for sealing cracks as well as whole decks, instead of applying linseed oil. Linseed oil is the only concrete sealer listed in Missouri's Standard Specifications, and is used for resistance to scaling on new bridge decks. Secondly, some recent projects re-texturing decks built with dense concrete overlays have specified penetrating concrete sealers. The concern was if linseed oil was used on the diamond ground surface, it might not have good frictional properties. Either extra linseed oil might be left on the surface or the linseed oil might not cure quickly enough to switch traffic onto it after short lane closures. It was decided that new penetrating sealers be used in these situations by special provision to the contract. Four types of penetrating sealers were tested against linseed oil in the laboratory to rate their effectiveness, pick criteria for testing needed in accepting sealers and write a new specification to best protect concrete bridge decks from deterioration. In the case of new concrete decks it is recognized by American Concrete Institute that cracks smaller than 0.18 mm do not let chloride ions from salt penetrate through them. It was concluded that if there are very few cracks bigger than this, those cracks do not need to be sealed, and linseed oil can be used to help prevent scaling. If cracks were bigger than this it would be better to forego the linseed oil treatment and use a crack sealer. A table with concrete sealers classified into three performance groups is presented with the sealers ranked by performance and including cost per ft. 2. It was found from this study that penetrating sealers are not good at sealing large cracks. Although an Ohio DOT test was used in this study to measure crack sealing capabilities, it did not give consistent answers. It did help identify what size cracks need to be sealed by a better crack sealer, such as a two-part epoxy. It was found that cracks in the range of 0.30 mm to 0.64 mm start to allow a saline solution to leak through the concrete very swiftly. So even if a penetrating sealer is used on a deck with many cracks, those 0.64 mm cracks and bigger need a more appropriate crack filler/sealer to seal the individual big cracks first. Sealing cracks on existing older decks should be done using less expensive products that seal the entire small and medium-sized cracks and are effective for 2-4 years. A table listing these crack sealers is also presented. As a result of testing in this study one of these products was approved for preventive maintenance use statewide.
Author : José A. Pincheira
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.:/5 (754 download)
Download or read book Effectiveness and Performance of Crack Sealants for Bridge Decks written by José A. Pincheira and published by . This book was released on 2009 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was to assess the effectiveness and performance of selected products for sealing cracks in concrete bridge decks. The project was a follow up study of an earlier investigation to expand the selection of crack sealers for use in the field. A total of nine crack sealants were tested in this study under laboratory conditions that simulated the exposure to deicing salts and freeze?thaw cycles encountered in practice. Five of the products had been tested earlier under the same laboratory conditions but for a limited range of crack widths. Four additional products were also included in this study. Based on the test results, the performance of the sealants was evaluated and ranked, and recommendations for their use in the field are provided.
Author : Karl Andrew Johnson
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (858 download)
Download or read book Crack and Concrete Deck Sealant Performance written by Karl Andrew Johnson and published by . This book was released on 2013 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Whiting
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (28 download)
Download or read book Condition Evaluation of Concrete Bridges Relative to Reinforcement Corrosion written by David Whiting and published by . This book was released on 1992 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: An electrical resistance method and a surface absorption method for the evaluation of penetrating sealers for portland cement concrete for bridge structures were tested in the laboratory and in the field. Both methods are nondestructive, rapid, and can be used on horizontal and vetical surfaces. Laboratory results are comaparable to the AASHTO T259 or NCHRP 244 Series II tests. Field results were generally successful, but hot or cold temperature made it difficult to perform the tests. Further information about evaluating the field performance of penetrating sealants was obtained by surveying the highway agencies in the United States and in Canada.
Author : Robert G. Tracy
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (376 download)
Download or read book Penetrating Sealers for Protecting Concrete Bridge Decks Against Chloride Intrusion written by Robert G. Tracy and published by . This book was released on 1979 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Upul Attanayaka
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (522 download)
Download or read book Criteria and Benefits of Penetrating Sealants for Concrete Bridge Decks written by Upul Attanayaka and published by . This book was released on 2002 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report evaluates the potential durability gained by the use of penetrating sealants on concrete bridge decks. The factors affecting the depth of penetration are identified through a fundamental approach and the literature on penetrating sealants, concrete deterioration, concrete durability, and concrete permeability. Properties and the use of silane, siloxane, and high molecular weight methacrylate sealers are discussed.
Author : Jonathan Riley Dunn
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (936 download)
Download or read book Performance of Concrete Bridge Deck Sealers written by Jonathan Riley Dunn and published by . This book was released on 2015 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research was to determine an improved method for evaluating bridge deck sealer products for the Alabama Department of Transportation (ALDOT) through a synthesis of two testing methods: NCHRP Report 244 Series II tests and standards developed by the Alberta Ministry of Transportation (BT Series). Five sealer products were evaluated for their resistance to moisture and chloride ingress, performance after simulated traffic wear, and depth of sealer penetration into the concrete. The products tested included four epoxy-based sealer products and one sodium silicate sealer product. The sealers were evaluated on three different concrete mix designs representing the range of bridge deck concrete in service with ALDOT. Concrete cube specimens were fabricated, sealed, conditioned, and subjected to different tests. One test evaluated the waterproofing performance of sealers before and after abrasive conditioning (representing traffic wear). Another test determined the products' ability to resist chloride penetration and their waterproofing performance in a saltwater solution. The chloride content was measured by potentiometric titration with silver nitrate and X-ray fluorescence spectroscopy (XRF). Sealer penetration depth as determined by a dye method and scanning electron microscopy (SEM). Initial (pre-abrasion) waterproofing performance results generally showed a good correlation to chloride resistance. XRF and titration analyses provided nearly identical results for measuring chlorides in concrete; however, XRF is a preferred method for determination of chloride content because it is much faster than titration. Two epoxy sealers outperformed all products for all evaluation criteria. A third epoxy sealer had good overall performance, but many specimens sealed with this product developed cracks that warranted further investigation. The sodium silicate sealer performed poorly compared to all four epoxy-based sealers. The epoxy-based sealers did not exhibit any measurable sealer penetration into the concrete and the sodium silicate sealer penetrated less than 100 mm into the concrete.
Author : Bipin Adhikari
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Performance and Durability Assessment of Concrete Bridge Deck Sealants written by Bipin Adhikari and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (91 download)
Download or read book Concrete Bridge Deck Crack Sealant Evaluation and Implementation written by and published by . This book was released on 2014 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 12 sealant products were applied on the Smith Avenue High Bridge in St. Paul and evaluated over a three-year period. Details, such as surface preparation and application methods, were documented for each product and are conditions specific to each product. Sealant performance was evaluated through field permeability testing, visual observations, and petrographic examination. Visual observations provided evidence that approximately 67 percent of test sections were performing effectively after one winter but only 4 percent after two winters. After three winters, 58 percent of the test locations were visually characterized as ineffective and 42 percent as partially effective. Product performance significantly reduced over the third winter, primarily due to major loss of sealant and surface sand materials. Coring was performed after the second winter, and the cores were photographed and subjected to a petrographic evaluation. The observed depth of sealant penetration was highly variable and likely is dependent on the presence of debris within the crack, original crack width, and the deck temperatures during application. The predominant failure mode observed under magnification was detachment from the crack face and not within the sealant materials. Based on numerous factors, four epoxy and three methacrylate products were recommended for consideration on MnDOT's Approved Products List. Each product recommendation contains the surface preparation and application method conditions under which they were applied. It is also recommended that MnDOT look into increasing the frequency of its routine crack sealing maintenance program from the current five-year cycle.
Author :
Publisher :
ISBN 13 :
Total Pages : 370 pages
Book Rating : 4.3/5 (555 download)
Download or read book Focus written by and published by . This book was released on 1989 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (128 download)
Download or read book Bridge Deck Sealer Monitor written by and published by . This book was released on 2021 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of sealers to prevent corrosion damage and extend the life of bridge decks is increasingly implemented as a bridge preservation tool to help ensure the state of good repair for bridge decks. The TRB Highway Innovations Deserving Exploratory Analysis (IDEA) Program's Bridge Deck Sealer Monitor: Thermal Sealcheck presents a new nondestructive technology to evaluate the effectiveness of sealers applied to concrete bridge decks. The concept uses time-lapse thermography to measure water absorption/evaporation characteristics on a bridge deck in order to assess the effectiveness of concrete sealer.
